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Harley M8 Primary Oil Capacity (All Engine Sizes Explained)

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Rev up your knowledge and prepare to go full throttle as we delve into the heart of the beast that is your Harley’s M8 engine. Immerse yourself in an ocean of information specifically centred around the pivotal topic of Harley M8 primary oil capacity, cut through the confusion and discover the different aspects of engine sizes and their oil capacities explained in layman’s terms. For the avid biker, the DIY mechanic, or the Harley enthusiast, get ready to be filled with fascinating insider knowledge that could potentially up your game. Whether you’re planning to change your Harley’s oil, optimize performance or simply satiate your natural curiosity about these beastly engines – you’re on the right track. As we always say – there’s no knowledge too extra when it comes to truly understanding your freedom machine. Welcome to your ultimate guide to the Harley M8’s primary oil capacity across all engine sizes. Stay tuned and enjoy the ride.

Looking for motor oil? Harley M8 Oil Capacity Guide (All Sizes Explained)


107ci Milwaukee Eight engine from Harley Davidson

What Is The Primary Oil Capacity For The Harley M8 107 Engine?

Which Type Of Oil Is Best For The Primary In The M8 107?

When using the M8 107 engine, it’s recommended to use a high-quality motorcycle oil compatible with wet clutches. This oil type ensures smooth clutch engagement and disengagement, reducing the risk of clutch drag and difficulty in finding neutral at idle. Different riders may have varying preferences, but always ensure the oil is suitable for your engine’s requirements.

How Often Should The Primary Oil Be Changed In The M8 107?

Regular maintenance is key to the longevity and performance of your M8 107 engine. Typically, the primary oil should be changed after every 5,000 miles. However, this can vary depending on riding conditions and frequency.

What Are The Signs Of Low Primary Oil In The M8 107?

Identifying signs of low primary oil can prevent potential engine damage. Some common indicators include difficulty in shifting gears, unusual engine noise, and a noticeable decrease in engine performance. If you notice any of these signs, it’s advisable to check your primary oil level immediately.

Is The Procedure For Checking Primary Oil Different In The M8 107?

The procedure for checking primary oil in the M8 107 engine is straightforward. With the motorcycle upright and on a level surface, open the clutch inspection cover and check the oil level. It should be just touching the bottom of the clutch diaphragm spring.

114 cubic inch Milwaukee Eight engine from Harley Davidson

What Is The Primary Oil Capacity Of The Harley M8 114 Engine?

What Type Of Oil Should Be Used In The M8 114 Primary?

A high-quality motorcycle oil compatible with wet clutches is also recommended for the M8 114 engine primary. This type of oil offers optimal lubrication for the engine’s components, ensuring smooth operation.

Recommended Interval For Changing Primary Oil In M8 114?

The primary oil in an M8 114 engine should be changed after every 5,000 miles. However, this can vary based on your riding habits and conditions. Regular maintenance checks will help keep your engine running optimally.

How To Check The Primary Oil Level In A Harley M8 114?

Checking the primary oil level in an M8 114 engine is similar to the M8 107. The motorcycle should be upright on a level surface. Opening the clutch inspection cover will allow you to see if the oil is just reaching the bottom of the clutch diaphragm spring.

What Happens If The Primary Oil Is Overfilled In The M8 114?

Overfilling the primary oil in your M8 114 engine can lead to issues such as rough clutch engagement, incomplete disengagement, clutch drag, and difficulty in finding neutral at idle. Additionally, the extra pressure can cause premature seal or gasket failure.

117ci m8 engine from Harley Davidson

How Much Oil Does The Primary Of A Harley M8 117 Hold?

What Is The Ideal Oil For The M8 117 Primary System?

The ideal oil for the M8 117 primary system is a high-quality motorcycle oil compatible with wet clutches. Consistent use of this oil type can help maintain smooth clutch operation and overall engine performance.

Primary Oil Change Frequency For The Harley M8 117?

The recommended primary oil change frequency for the Harley M8 117 is every 5,000 miles. Regular maintenance checks and oil changes can help prolong the life of your engine and maintain optimal performance.

Indicators Of Low Primary Oil In The Harley M8 117?

Signs of low primary oil in the Harley M8 117 are similar to those in other M8 engines. These include difficulty in shifting gears, unusual engine noise, and a decrease in engine performance. If you notice any of these signs, it’s recommended to check and top up your primary oil level.

Checking Primary Oil Level In The Harley M8 117: Any Special Instructions?

When checking the primary oil level in the M8 117, ensure the motorcycle is upright and on a level surface. Open the clutch inspection cover and ensure the oil level is just touching the bottom of the clutch diaphragm spring.

Read next: The Best Oil For Harley Davidson Motorcycles Gets Revealed


How Much Fluid is in a M8 Primary?

A M8 primary typically holds about 34-38 ounces of fluid. However, the exact amount can vary, so it’s recommended to consult the specific model’s manual for accurate capacity.

How Many Quarts of Oil Does a Harley Primary Take?

A Harley primary usually requires around 1 to 1.5 quarts of oil. The precise amount depends on the model, so referring to the owner’s manual for specific guidelines is advisable.

What is the Best Primary Oil for Harley M8?

The best primary oil for a Harley M8 is a high-quality motorcycle-specific primary oil. Many riders prefer synthetic oils for their durability and performance. Consult your motorcycle’s manual or a Harley dealership for specific brand recommendations.

How Much Oil Goes in a Harley Transmission?

The amount of oil required for a Harley transmission usually ranges from 20 to 24 ounces. Always check the owner’s manual for the exact quantity needed for your specific model.

How Often Should Harley Primary Oil be Changed?

Harley primary oil should typically be changed every 10,000 to 20,000 miles, depending on the model and riding conditions. Regular maintenance checks as recommended in the owner’s manual are crucial for optimal performance.

Is Harley Transmission Oil the Same as Engine Oil?

No, Harley transmission oil is not the same as engine oil. They are formulated differently to meet the specific requirements of each system. Using the correct type of oil for each component as recommended in the motorcycle’s manual is essential for the longevity and performance of the bike.